Liquid straining device



June 13, 1944;

A. M. GOODLOE LIQUID STRAINING DEVICE Filed March 4, .1945 2 Sheets-Sheet l INVENTOR. jzejf. Ghedina, BY

ATTORNEY.

June 13, 1944. A, M. GOODLOE 2,351,332

LIQUIDSTRAINING DEVICE Filed Marlo 4, 1943 2 sheets-sheet 2 INVENTOR. fz'ajf oocZZae, BY

ATTORNEY.

Patented June 13, i944 cnr YOFFICE LIQUID STRAIN ING DEVICE Alfred M. Goodloe, Montclair, N. 3., assigner to Metal Textile Corporation, West Orange, N. J., a corporation of Delaware Application March 4, 1943, Serial No. 477,955

(Cl. 2lb- 190) 4 Claims.

This invention relates to improvements in strainer devices for separating suspended solids from liquids passed therethrough, whereby to clarify and cleanse said liquid for initial or repeated use.

This invention has for an object to provide a simple and comparatively inexpensive construction of strainer device provided with clean liquid collecting chamber having intake and discharge means, and further provided with separable baglike strainer means; means being provided for detachably securing the latter in supported relation to said collecting chamber for communication with the intake means thereof, whereby said strainer means may be quickly and easily detached and removed at will for cleansing and replacement. Y

The inventionhas for anotherjobject to provide a novel strainer device having a collecting chamber one wall of which is provided with intake means bounded by externally projecting keeper flanges and including strainer bag means expanded by an inserted open-work frame having a top rim member around which the marginal portions of the strainer bag may be inwardly folded, whereby the mouth end of the strainer bag may be abutted against said collecting chamber wall in communication with theY chamber intake means, and retained against shifting displacement from such relation by said keeper flanges; meansbeing further provided, in extension from the collecting chamber, for the detachable support of a thrust and retainer means which is adapted to engage the closed end of the frame expanded strainer bag, so aste secure the latter against displacement from the described operative attachment thereof to the collecting chamber, and yet subject to quick and easy release and removal therefrom for cleansing and Vreplacement.

' The invention has for a further object to pro-v vide a novel strainer bag per se which is made of a knitted fabric, said fabric beingknit from a fibrous textile strand and a rigidulous metallic or wire strand, knitted together in parallel, to form a mesh fabric of selected mesh loop size, and whereinthe rigidulous metallic or wire constituent of saidfabric supports and holds the fibrous textile constituent thereof against stretch or other deformation, so that the mesh interstices are maintained substantially uniform in size throughout the surface area ofthe bag, and thus of uniform straining effect throughout; said textile constituent. by reason of its brous character, also providing a filamentous surface, filaments of which are adapted to project into the adjacent loop openings, and thereby increase the efficiency of the straining action thereof.

Other objects of this invention, not at this time more particularly enumerated, will be understood from the following detailed description of the same.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which- Fig. l is a side elevational View of a strainer device according to this invention; Fig. 2 is an .end elevational view thereof; Fig. 3 is a bottom plan View thereof; and Fig. 4 is a vertical sectional view thereof, taken on line 4-4 in Fig. 2, but drawn yon an enlarged scale.

. Fig. 5 is a top end elevational view of a frame member for insertion in a strainer bag to operatively expandthe same.

Fig. 6 is a fragmentary face view of the strainer bag material as knitted from a fibrous textile strand and a rigidulous metallic or wire strand, knitted in parallel, and adapted to provide a nonstretching and substantially non-deformable, uniformly interstitial strainer material.

Similar characters of reference are employed vin the above-described views, to indicate corresponding parts.

An illustrativeembodiment of a strainer deyice, according to this invention, and as shown in ,the accompanying drawings, comprises a collect- ,ing chamber formed by atop wall I0, side walls Il, end walls I2 and a bottom Wall I3, thus pro- .Viding an enclosed chamber which is rectangular in shape. It will` be obvious, however, that the shape of the chamber is not material, and is, of course., subject to optional variation. Dependent from theunderside of said collecting chamber, at opposite portionsthereof, are bracket members I4. In'the formofcollecting chamber, constituting an illustrative embodiment thereof as Shown, said bracket members I4 depend respectively from the opposite ends of the chamber structure. Secured to said bracket members lll,

to extend perpendicularly kdownward therefrom,

are hanger bars I5; there preferably being two such hanger bars llaterally spaced apart, for extension from each end of the collecting chamber structure. Said hanger bars I5 may be rigidly attached to the bracket members by any suitable fastening means, vbut preferably are welded thereto. Alixed tothe lower free ends of said hanger bars I5, for axialextension therefrom, are screw-tlneaded,shanksl I6. Said hanger bars I5 are` preferably. of channel formation for rigidity and strength.

Formed in the bottom wall I3 of the collecting chamber are intake means provided by one or more suitably located openings I1. The number of said openings I1 may be Varied according to the amount of straining capacity desired to be obtained. Said openings are spaced one from another, and suitably secured to the bottom wall I3, as e. g. by Welding the same thereto, are pairs of externally dependent keeper flanges I8, the members of which respectively border the opposite sides of each opening I1, thus providing a downwardly open seating channel adapted to embrace a strainer bag means, when the latter is operatively applied to the collecting chamber-for communication with said intake openings theref of, as will be hereinafter more fully explained.

Provided in connection with another wall of the collecting chamber, preferably the top wall ID thereof, is an outletI means. In a preferred form thereof, this outlet comprises a coupling nipple I 9, which is suitably aiiixed to and for extension through the wall into the interior of the collecting chamber, and the exteriorly projecting end of which is screw-threaded, as at 20, for coupling thereto a pipe or like conduit adapted to convey clean strained liquid from the collecting chamber to a desired place of use.

The strainer means of the device comprises strainer bags 2I corresponding in number to the number of intake openings I1 with which the collecting chamber is provided. Each strainer bag 2I is expanded by means of an open-work frame which is inserted therein. Said frame, in a preferred construction thereof, comprises a series of transverse U-shaped body members 22 made of strong and comparatively rigid metallic rod or wire stock. Said U-shaped body members 22 are spaced apart in trie direction of the width of the strainer bag to be served thereby, and to upper terminals of their legs are joined a top-rim member 23 which defines the open or mouth end of the frame. The lower or closed ends of the U-shaped body members are secured together against relative displacement by a transverse tie-rod 24 extending across said ends. The described elements of the frame are preferably joined together by welding, thus providing a very strong and rigid frame structure. The frames thus provided are of somewhat less length than the length of the strainer bags to be served thereby. In use, a frame structure is inserted downwardly through the open mouth of a strainer bag, to extend interiorly therethrough to the bottomY closed end thereof. The strainer bag being of somewhat greater length than the length of the frame, when the latter is inserted in the strainer bag, a marginal portion 25 of the mouth end of the latter will project exteriorly beyond the top rim member 23 of the frame. Y Such projecting marginal portion 25 is'turned inwardlyY and folded'around the top rim member 23 ofthe frame, and is tucked into the strainer bag interior. By reason of this arrangement, not only are bag and frame structures suitably disposed in opera-l tive assembled relation, but the mouth'end of the strainer bag is symmetrically shaped and firmly supported by the enclosed top rim member 23 of the frame, whereby to provide an unyielding seating lip 26 at the mouth end of thev strainer bag for operative abutment against the collecting chamber bottom wall I3, and in communication with an intake opening thereof. y,

To operatively assemble a frame expanded strainer bag ZI relative to the collecting chamber, the mouth end of the former is inserted be# tween a pair of the keeper flanges I8 which straddle an intake opening I1 with which the strainer bag is to communicate, and the frame top rim supported seating lip 26 of the latter firmly abutted against the exterior face of the collecting chamber bottom wall. The strainer bags 2| having each been thus operatively related to respective intake openings I1 of the collecting chamber, means is provided for releasably securing the same in such assembled relation. This means comprises clamp bars 21 preferably of channeled form or U-shape in cross section, thus providing the'same with apair of gripper portions 28 formed by the free edges of the clamp bar flanges. The clamp bars 21 are each provided with openings 29 respectively adjacent its opposite ends, and spaced to'receive insertion therethrough of the screwthreaded shanks I6 with which the free end portions of longitudinally aligned hanger bars I5 are provided. The clamp bars 21 are applied over the Shanks I6, gripper portions 28 upward, in bridging relation between longitudinally aligned hanger bars I5. By applying thumb-nuts 3U to the Shanks I6, and turning the same home against theclamp bars 21 applied thereto, said Iclamp bars are caused tothrust against the bottom ends of the frame supported and expanded strainer bags, whereby to thrust the latter toward the collecting chamber, with their seating lips 2li firmly abutted against the bottom wall I3 thereof. The gripper portions 28 of the clamp bars 21 will non-slippingly engage the rough surface of the strainer bag material, and will thus firmly hold the same against transverse movement or shifting displacement. Since the sides of the mouth end portions of the strainer bags are embraced by keeper flanges I8, said strainer bags are likewise securely held against lateral movement or shifting displacement.

It will be obvious that when it is'desired to release the strainer bags, for removal from operative assembled relation to the collecting charnber, so that the same may be cleansed when necessary and replaced, it is merelyrequired to detach the clamp bars 21, whereby to free the strainer bags for such removal. L

While the strainer bags may be made of various materials which provide the necessary liquid pervious interstitial structure suitable for straining effect, so far as the general construction of the straining device as above described is concerned, it is also the purpose of this invention to provide a strainer bag formed from a specific knitted mesh fabric of novel structure, a fragmentary face view of which is shown in Fig. 6. Saidknitted mesh fabric is knit from a brous textile strand a and a rigidulous metallic or wire strand b, said strands being knitted together in parallel to provide a selected mesh loop size determinative of individual size of straining interstices desired to be furnished. In the knitted fabric thus obtained, the rigidulous metallic or wire constituent b supports and holds relatively highly flexible fibrous textile constituent a against stretch or other deformation, so that the mesh interstices are maintained substantially uniform in size throughout the entire extent or area of the fabric, and therefore of the strainer bag formed therefrom, and consequently a uniform straining eect is assured at all exposed portions of the strainer bag. In addition to this, the textile constituent a, by reason of its fibrous character, possesses a filamentous'surface; whereby fila,- ments, which outstand from the surface thereof,l are adapted to project into and more or less across the mesh loops formed by said textile strand a, thus forming a filamentary network which functions to increase the straining eiciency of the strainer bag.

The strainer bags may comprise one or more thicknesses of mesh material f the same or relatively graded mesh size.

The straining device of this invention is especially useful for service in liquid circulating apparatus employed in connection with machine tools adapted to serve cooling, lubricating or other treating liquid to an operating tool and the material being worked thereby, so that the liquid thus circulated may be efficiently freed from any accumulation of lint, chips, dirt or other foreign substances or particles carried back with the liquid from the operating tool into the liquid supply reservoir in which the straining device is submerged, so that recirculated liquid must first pass through said straining device.

It will be understood that some changes may be made in the straining device structure shown in the drawings and above described without departing from the scope of this invention as dened by the following claims. It is therefore intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Iclaim:

1. A liquid straining device comprising a col` lecting chamber having intake means in a wall thereof, clean liquid discharge means leading outwardly from said chamber, spaced keeper anges externally projecting from said wall in straddling relation to said intake means, strainer bag means, frame means inserted within said strainer bag means to expand the same, said frame means having top rim means within the open mouth of said strainer bag means about which marginal portions of the latter are folded to provide seating lip means to abut said collecting chamber wall whereby to dispose the strainer bag means in communication with said intake means thereof and retained against lateral shifting displacement by and between said keeper anges which bound said intake means, hanger means extending from said collecting chamber, a thrust and retainer means adapted to cross and engage bottom end portions of said frame expanded strainer bag means, and means to detachably secure said thrust and retainer means in supported connection with said hanger means.

2. A liquid straining device comprising a collecting chamber having intake means in a wall thereof, clean liquid discharge means leading outwardly from said chamber, spaced keeper flanges externally projecting from said wall in straddling relation to said intake means, strainer bag means, frame means inserted within said strainer bag means to expand the same, said frame means having top rim means within the open mouth of said strainer bag means about which marginal portions of the latter are folded to provide seating lip means to abut said collecting chamber wall whereby to dispose the strainer bag means in communication with said intake means thereof and retained against lateral shifting displacement by and between said keeper anges which bound said intake means, hanger means extending from said collecting chamber, screw-threaded Shanks dependent from said hanger means, a thrust and retainer means adapted to cross and engage bottom end portions of said frame expanded strainer bag means, said thrust and retainer means having perforate end portions to engage over said shanks to connect the same to and between said hanger means, and thumb-nuts to releasably secure said thrust and retainer means in such connection.

`3. In a liquid straining device as dened in claim 1, wherein the thrust and retainer means vcomprises a channeled bar the free edges of the side anges of which provide gripper portions to non-slippingly engage and hold the frame expanded strainer bag means against transverse shifting displacement.

4. In a liquid straining device as dened in claim 2, wherein the thrust and retainer means comprises a channeled bar the free edges of the side flanges of which provide gripper portions to non-slippingly engage and hold the frame expanded strainer bag means against transverse shifting displacement.

ALFRED M. GOODLOE. 

